Portal 2

I have tried everything to get portal 2 to load for me. I have uninstalled the game and reinstalled it. I have verified the integrity of my game cache and its fine. My computer surpasses the recommended requirements for Portal 2 and yet I can still not load the game. HELP!

I have recently had an issue with KernelBase.dll appcrash errors which drove me mad, it was a simple solution of deleting the Portal2 folder from Steam and game profile in my documents then redownloading and it worked again.

I have recently had an issue with KernelBase.dll appcrash errors which drove me mad, it was a simple solution of deleting the Portal2 folder from Steam and game profile in my documents then redownloading and it worked again.

I went to windows event logs and it says that Steam has a error which is classified as "Error: Failed to poke open firewall."